新课引入：
Step1, Presentation
1. Look at the pictures and discuss: what can you think of when you see the pictures? → murder, murderer, detective, criminal, crime, suspect, victim, police
2. Read the new words after the teacher and practice them.
3. People usually think a clever detective is very important in a case. Do you think so? Do you know these detectives?
4. Discussion: what qualities should a detective have?
亮标：
Show the students the learning aims
自学指导
Step 2 Presentation
Write the new words on the blackboard and practice reading them.
评讲与拓展
Step3 Comic strip
1. Here is a detective in our comic strip, too. Listen to the tape and answer the questions.
2. Listen again and repeat. Then practice it by the students themselves. ( Recite it or act it out.)
3. Practice the useful expressions. (dress, look for, go missing)
Step3, Welcome to the unit
1. A murder happened last Saturday. The detective wrote a report. Let’s read it and try to be a detective.
2. Go through Part A on page 95 together and practice the new words.
3. Do some exercises according to the report.
4. Go through Part B in pairs.
5. Practice the useful expressions. (report, happen, suspect, note, height)
课堂小结：
Ask some students to recite the dialogue
课堂训练：
Do the daily exercises